Geologic Timescale

By tswain

  • Cambrian Period-570-500MYA

    Cambrian Period-570-500MYA
    Earliest marine life recorded. Abundant amout of Trilobite.

  • Ordovician Period - 500-435 MYA

    Ordovician Period - 500-435 MYA
    Echinoderms, Invertabrates, mollusks, jawed and armored fish.

  • Silurian Period - 435-395MYA

    Silurian Period - 435-395MYA
    Tiktaalik

  • Devonian Period - 395-345 MYA

    Devonian Period - 395-345 MYA
    Armored fish go extinct. ammonites and amphibians

  • Carboniferous Period - 345-280 MYA

    Carboniferous Period - 345-280 MYA
    Reptiles, Scale trees, seed ferns

  • Permian Period - 280-225 MYA

    Permian Period - 280-225 MYA
    Pangea, or the 'Super continent'

  • Triassic Period - 225-195 MYA

    Triassic Period - 225-195 MYA
    Earliest dinosaurs, cycads, and conifers

  • Jurassic Period - 195-136 MYA

    Jurassic Period - 195-136 MYA
    Earliest birds and mammals

  • Cretaceous Period - 136-65 MYA

    Cretaceous Period - 136-65 MYA
    Age of Dinosaurs

  • Teritary Period - 65-1.8 MYA

    Teritary Period - 65-1.8 MYA
    Age of Mammals